1 /* Copyright (c) 2004-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "src/msg/msg_private.h"
8 #include "xbt/sysdep.h"
10 #include "simgrid/simix.h"
11 #include <simgrid/s4u/host.hpp>
13 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(msg);
15 /** @addtogroup m_host_management
16 * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Hosts" --> \endhtmlonly
17 * (#msg_host_t) and the functions for managing it.
19 * A <em>location</em> (or <em>host</em>) is any possible place where
20 * a process may run. Thus it may be represented as a
21 * <em>physical resource with computing capabilities</em>, some
22 * <em>mailboxes</em> to enable running process to communicate with
23 * remote ones, and some <em>private data</em> that can be only
24 * accessed by local process.
28 /********************************* Host **************************************/
29 msg_host_t __MSG_host_create(sg_host_t host) // FIXME: don't return our parameter
31 msg_host_priv_t priv = xbt_new0(s_msg_host_priv_t, 1);
33 priv->dp_objs = xbt_dict_new();
35 priv->dp_updated_by_deleted_tasks = 0;
36 priv->is_migrating = 0;
38 priv->affinity_mask_db = xbt_dict_new_homogeneous(NULL);
40 priv->file_descriptor_table = xbt_dynar_new(sizeof(int), NULL);
41 for (int i=1023; i>=0;i--)
42 xbt_dynar_push_as(priv->file_descriptor_table, int, i);
44 sg_host_msg_set(host,priv);
49 /** \ingroup m_host_management
50 * \brief Finds a msg_host_t using its name.
52 * This is a name directory service
53 * \param name the name of an host.
54 * \return the corresponding host
56 msg_host_t MSG_host_by_name(const char *name)
58 return simgrid::s4u::Host::by_name_or_null(name);
61 /** \ingroup m_host_management
63 * \brief Set the user data of a #msg_host_t.
65 * This functions checks whether some data has already been associated to \a host
66 or not and attach \a data to \a host if it is possible.
68 msg_error_t MSG_host_set_data(msg_host_t host, void *data) {
69 sg_host_user_set(host, data);
73 /** \ingroup m_host_management
75 * \brief Return the user data of a #msg_host_t.
77 * This functions checks whether \a host is a valid pointer or not and return
78 the user data associated to \a host if it is possible.
80 void *MSG_host_get_data(msg_host_t host) {
81 return sg_host_user(host);
84 /** \ingroup m_host_management
86 * \brief Return the location on which the current process is executed.
88 msg_host_t MSG_host_self(void)
90 return MSG_process_get_host(NULL);
94 /** \ingroup m_host_management
96 * \brief Start the host if it is off
98 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref SURF_plugin_energy for more info on DVFS.
100 void MSG_host_on(msg_host_t host)
105 /** \ingroup m_host_management
107 * \brief Stop the host if it is on
109 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref SURF_plugin_energy for more info on DVFS.
111 void MSG_host_off(msg_host_t host)
117 * \brief Frees private data of a host (internal call only)
119 void __MSG_host_priv_free(msg_host_priv_t priv)
124 unsigned int size = xbt_dict_size(priv->dp_objs);
126 XBT_WARN("dp_objs: %u pending task?", size);
127 xbt_dict_free(&priv->dp_objs);
128 xbt_dict_free(&priv->affinity_mask_db);
129 xbt_dynar_free(&priv->file_descriptor_table);
134 /** \ingroup m_host_management
135 * \brief Return the current number MSG hosts.
137 int MSG_get_host_number(void)
139 return xbt_dict_length(host_list);
142 /** \ingroup m_host_management
143 * \brief Return a dynar containing all the hosts declared at a given point of time
144 * \remark The host order in the returned array is generally different from the host creation/declaration order in the XML platform (we use a hash table internally)
146 xbt_dynar_t MSG_hosts_as_dynar(void) {
147 return sg_hosts_as_dynar();
150 /** \ingroup m_host_management
151 * \brief Return the speed of the processor (in flop/s), regardless of
152 the current load on the machine.
154 double MSG_get_host_speed(msg_host_t host) {
155 return host->speed();
159 /** \ingroup m_host_management
160 * \brief Return the number of cores.
163 * \return the number of cores
165 int MSG_host_get_core_number(msg_host_t host) {
166 return host->core_count();
169 /** \ingroup m_host_management
170 * \brief Return the list of processes attached to an host.
173 * \return a swag with the attached processes
175 xbt_swag_t MSG_host_get_process_list(msg_host_t host)
177 xbt_assert((host != NULL), "Invalid parameters");
178 return host->processes();
182 /** \ingroup m_host_management
183 * \brief Returns the value of a given host property
186 * \param name a property name
187 * \return value of a property (or NULL if property not set)
189 const char *MSG_host_get_property_value(msg_host_t host, const char *name)
191 return (const char*) xbt_dict_get_or_null(MSG_host_get_properties(host), name);
194 /** \ingroup m_host_management
195 * \brief Returns a xbt_dict_t consisting of the list of properties assigned to this host
198 * \return a dict containing the properties
200 xbt_dict_t MSG_host_get_properties(msg_host_t host)
202 xbt_assert((host != NULL), "Invalid parameters (host is NULL)");
203 return host->properties();
206 /** \ingroup m_host_management
207 * \brief Change the value of a given host property
210 * \param name a property name
211 * \param value what to change the property to
212 * \param free_ctn the freeing function to use to kill the value on need
214 void MSG_host_set_property_value(msg_host_t host, const char *name, char *value,void_f_pvoid_t free_ctn) {
216 xbt_dict_set(MSG_host_get_properties(host), name, value,free_ctn);
220 /** @ingroup m_host_management
222 * @brief Determine if a host is up and running.
224 * See also #MSG_host_on() and #MSG_host_off() to switch the host ON and OFF and @ref SURF_plugin_energy for more info on DVFS.
226 * @param host host to test
227 * @return Returns true if the host is up and running, and false if it's currently down
229 int MSG_host_is_on(msg_host_t host)
231 xbt_assert((host != NULL), "Invalid parameters (host is NULL)");
232 return sg_host_is_on(host);
234 /** @ingroup m_host_management
236 * @brief Determine if a host is currently off.
238 * See also #MSG_host_on() and #MSG_host_off() to switch the host ON and OFF and @ref SURF_plugin_energy for more info on DVFS.
240 int MSG_host_is_off(msg_host_t host)
242 xbt_assert((host != NULL), "Invalid parameters (host is NULL)");
243 return !(sg_host_is_on(host));
246 /** \ingroup m_host_management
247 * \brief Set the parameters of a given host
250 * \param params a prameter object
252 void MSG_host_set_params(msg_host_t host, vm_params_t params)
254 host->setParameters(params);
257 /** \ingroup m_host_management
258 * \brief Get the parameters of a given host
261 * \param params a prameter object
263 void MSG_host_get_params(msg_host_t host, vm_params_t params)
265 host->parameters(params);
268 /** \ingroup m_host_management
269 * \brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref SURF_plugin_energy.
271 * \param host host to test
272 * \param pstate_index pstate to test
273 * \return Returns the processor speed associated with pstate_index
275 double MSG_host_get_power_peak_at(msg_host_t host, int pstate_index) {
276 xbt_assert((host != NULL), "Invalid parameters (host is NULL)");
277 return host->powerPeakAt(pstate_index);
280 /** \ingroup m_host_management
281 * \brief Return the current speed of the processor (in flop/s)
283 * \param host host to test
284 * \return Returns the current processor speed
286 double MSG_host_get_current_power_peak(msg_host_t host) {
287 xbt_assert((host != NULL), "Invalid parameters (host is NULL)");
288 return host->currentPowerPeak();
291 /** \ingroup m_host_management
292 * \brief Return the total count of pstates defined for a host. See also @ref SURF_plugin_energy.
294 * \param host host to test
296 int MSG_host_get_nb_pstates(msg_host_t host) {
297 return sg_host_get_nb_pstates(host);
300 /** \ingroup m_host_management
301 * \brief Return the list of mount point names on an host.
303 * \return a dict containing all mount point on the host (mount_name => msg_storage_t)
305 xbt_dict_t MSG_host_get_mounted_storage_list(msg_host_t host)
307 xbt_assert((host != NULL), "Invalid parameters");
308 return host->mountedStoragesAsDict();
311 /** \ingroup m_host_management
312 * \brief Return the list of storages attached to an host.
314 * \return a dynar containing all storages (name) attached to the host
316 xbt_dynar_t MSG_host_get_attached_storage_list(msg_host_t host)
318 xbt_assert((host != NULL), "Invalid parameters");
319 return host->attachedStorages();
322 /** \ingroup m_host_management
323 * \brief Return the content of mounted storages on an host.
325 * \return a dict containing content (as a dict) of all storages mounted on the host
327 xbt_dict_t MSG_host_get_storage_content(msg_host_t host)
329 xbt_assert((host != NULL), "Invalid parameters");
330 xbt_dict_t contents = xbt_dict_new_homogeneous(NULL);
331 msg_storage_t storage;
334 xbt_dict_cursor_t cursor = NULL;
336 xbt_dict_t storage_list = host->mountedStoragesAsDict();
338 xbt_dict_foreach(storage_list,cursor,mount_name,storage_name){
339 storage = (msg_storage_t)xbt_lib_get_elm_or_null(storage_lib,storage_name);
340 xbt_dict_t content = simcall_storage_get_content(storage);
341 xbt_dict_set(contents,mount_name, content,NULL);
343 xbt_dict_free(&storage_list);
347 int __MSG_host_get_file_descriptor_id(msg_host_t host){
348 msg_host_priv_t priv = sg_host_msg(host);
349 xbt_assert(!xbt_dynar_is_empty(priv->file_descriptor_table),
350 "Too much files are opened! Some have to be closed.");
351 return xbt_dynar_pop_as(priv->file_descriptor_table, int);
354 void __MSG_host_release_file_descriptor_id(msg_host_t host, int id){
355 msg_host_priv_t priv = sg_host_msg(host);
356 xbt_dynar_push_as(priv->file_descriptor_table, int, id);